Re: [PATCH] interconnect: qcom: fix rpmh link failures

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On Sat, Dec 5, 2020 at 12:27 AM Bjorn Andersson
<bjorn.andersson@xxxxxxxxxx> wrote:
> On Fri 04 Dec 10:50 CST 2020, Arnd Bergmann wrote:

>
> Your patch looks correct to me, so:
> Reviewed-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
>
>
> But we're going to have to sprinkle a handful of these throughout the
> tree and we're not a lot of people who "understand" what it does (and at
> least I keep getting them wrong...)

Right, I already ran into another one.

> Perhaps it would be more reasonable to maintain this long term if we
> drop the possibility of compile testing these drivers independently of
> rpmh and command db? (I.e. drop the function stubs and rely on
> RPMH/COMMAND_DB to enable building under COMPILE_TEST)?

Agreed, I think that would be best. As long as RPMH and COMMAND_DB
can individually be enabled for CONFIG_COMPILE_TEST, all the
drivers will get enabled in an allmodconfig build, and we can just
list the dependencies.

I don't really like the headers too much that have an
#ifdef CONFIG_SUBSYSTEM with an alternative set of
inline functions, unless there is a reasonable expectations that
drivers work fine if that subsystem is disabled.

E.g. having the option to disable IPv6 makes sense despite
the complexity that adds, but compile-testing a driver without
a required subsystem that can also be enabled for compile-testing
hurts more than it helps.

> And just to make it clear, I think we should merge your patch to fix
> v5.11; then consider to simplify this past that.

Yes, sounds good.

       Arnd



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